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Jérôme Lalande

Jérôme Lalande

1732 CE–1807 CE · Bourg-en-Bresse

Joseph Jérôme Lefrançois de Lalande (French: [lalɑ̃d]; 11 July 1732 – 4 April 1807) was a French astronomer, freemason and writer. He is known for having estimated a precise value of the astronomical unit (the distance from the Earth to the Sun) using measurements of the transit of Venus in 1769.

Adapted from Wikipedia, licensed under CC BY-SA 4.0.

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